Decorative design for an automobile hood



FIG. 1 is a perspective view looking from the left front of a decorative design for an automobile hood showing my new design;

FIG. 2 is a top plan view; and,

FIG. 3 is a perspective view looking from the left rear.

The bottom view is omitted and is not part of the claimed design. 

The ornamental design for a decorative design for an automobile hood, as shown and described. 